docs: general fixes and improvements (#7918)

* docs improvements and changes

* updated module definition

* modules + dml changes

* fix build

* fix vale error

* fix lint errors

* fixes to stripe docs

* fix condition

* fix condition

* fix module defintion

* fix checkout

* disable UI action

* change oas preview action

* flatten provider module options

* fix lint errors

* add module link docs

* pr comments fixes

* fix vale error

* change node engine version

* links -> linkable

* add note about database name

* small fixes

* link fixes

* fix response code in api reference

* added migrations step

www/apps/resources/app/architectural-modules/workflow-engine/in-memory/page.mdx

@@ -31,7 +31,7 @@ npm install @medusajs/workflow-engine-inmemory
 Next, add the module into the `modules` property of the exported object in `medusa-config.js`:
 
 ```js title="medusa-config.js"
-const { Modules } = require("@medusajs/modules-sdk")
+import { Modules } from "@medusajs/utils"
 
 // ...
 

www/apps/resources/app/architectural-modules/workflow-engine/redis/page.mdx

@@ -31,7 +31,7 @@ export const highlights = [
 ]
 
 ```js title="medusa-config.js" highlights={highlights}
-const { Modules } = require("@medusajs/modules-sdk")
+import { Modules } from "@medusajs/utils"
 
 // ...
 
@@ -42,7 +42,7 @@ module.exports = defineConfig({
       resolve: "@medusajs/workflow-engine-redis",
       options: {
         redis: {
-          url: process.emv.WE_REDIS_URL,
+          url: process.env.WE_REDIS_URL,
         },
       },
     },